Hyena Mimicry – The ability to take on the form and/or characteristics of a hyena.
The D&D universe has several hyenas including the Corpse Hound (Creature Collection III. Savage Bestiary), Dire Hyena (Creature Collection III. Savage Bestiary), and Hyena (D&D 4th Edition – Monster Manual 1).
Bud and Lou (DC) belong to the Joker (Krypto the Superdog #1).
The Hyena (DC) has hyena like characteristics (DC Who’s Who #10).
Dire Hyena – World of Warcraft Monster Guide